Sum and Difference

1 article tagged "Sum and Difference"

Mid/Side: Sum, Difference, and the Stereo Field

Mid/side recording and processing explained — how M/S encoding works, the sum and difference matrix, correlation meters, the goniometer, and using M/S EQ in mastering.

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- OFFICE HOURS: We talked about some guitar problems that Christian was having, and also we talked about signal processing and gain staging. I referenced an article I wrote about 'The Gear of Shoegaze', as Christian was experimenting with getting that style tone for his guitar. We also discussed arrangements, listening habits, and also what synch agencies are and how they work with music in film.
- OFFICE HOURS: We introduced Hinde to some things about Beat Kitchen, and she got to meet Alee. We talked about what office hours are for, and ways to find things around Dischord. Alee and I talked about her song that she was working on and thinking of songwriting in terms of cycles of the year. Also possible beat kitchen meet ups!
- EAR-TRAINING-GYM: We worked through a full ear training gym this morning covering timbre identification, effects recognition, classic drum machine sounds, and melodic interval training. Students listened to and identified three flavors of electric guitar (dry, amped, and amped with effects), steel-string vs. nylon-string acoustic guitar, reverb vs. delay, and four iconic drum machines — the TR-808, TR-909, LinnDrum, and Prince's LD variant. We closed with a pitch warm-up and interval identification exercise, then applied everything to a brief listening analysis of Herbie Hancock's *Headhunters*.
- PRODUCTION-GYM: We broke down unique production techniques on The Beatles' Tomorrow Never Knows. First analyzing the vocal doubling and stereo techniques, covering a range of tools and approaches — from natural doubles to pitch-shifted harmonies — and discussed how to use doublers to blend a vocal into a mix rather than letting it sit on top. The conversation also touched on cymbal/room mic relationships and how compression choices affect the openness and ring of overhead sounds. Reference listening came up as a recurring thread, with discussion around actively analyzing records to sharpen production instincts.
- EAR-TRAINING-GYM: We set out this evening to explore an ear training exercise built around drum-swap comparisons — taking a recognizable song and replacing its original drum track with drums from other songs to hear how groove and texture shape the feel of a piece. Technical audio-sharing issues prevented the planned playback from happening, so the session shifted into open conversation while troubleshooting was attempted. The drum-swap concept and its creative/educational potential were introduced and will be revisited in a future session once the audio routing is sorted out.
- INSTRUMENT-GYM: We explored the intersection of sight-reading, improvisation, and musical fluency, using a jazz standard transcription as a springboard for discussing how to build vocabulary on guitar. Covered the language-learning analogy as a framework for understanding immersion versus structured study, and talked through practical approaches like slowing down transcriptions, playing over chord changes with single chord tones, and using cover projects as vehicles for deep musical study. Discussed how to narrow down long-term goals into short-term actionable targets, and previewed a future jam exercise where we'd work on improvising melody over moving changes.
- OFFICE HOURS: We worked through the Logic Pro signal chain hierarchy — channel strip settings, plugin-level presets, and the lesser-used Performance patch format — clarifying when and why to save at each level. Covered the general philosophy of starting with a blank slate rather than loading full library presets, and discussed field recording as a creative practice including microphone options for capturing real-world ambience.
- OFFICE HOURS: Covered a wide-ranging office hours session this afternoon that touched on server navigation, class placement guidance, music theory pedagogy, and live song feedback. Worked through a student's original song in detail — addressing chord naming, enharmonic spelling, and how a single unresolved voicing choice was affecting the feel of a key moment. Also spent time orienting newer members to how the school's platform works and discussing how to get the most out of available classes and formats.
- OFFICE HOURS: Worked through practical signal chain troubleshooting for electric guitar in a DAW environment — covering gain staging from interface input through amp and cabinet modeling, and how to identify where level issues are actually originating. Also touched on a music theory question around tonal gravity and key center, exploring why a chord progression built in A tends to pull toward D when it starts on the IV chord, and what techniques can help establish the intended tonic. Discord audio-sharing and screen-sharing workflows came up briefly as well.
- PRODUCTION-GYM: We used Tom Petty's *Wildflowers* as a production study, comparing the original home demo recordings to the final album to explore what restraint and omission look like as intentional production choices. The central question was: when a song arrives nearly fully formed, what is the producer's job — and why did they choose to leave certain things out? We also touched on the folk and blues traditions of shared musical vocabulary, the placeholder nature of demo sections, and the producer's role in helping an artist gain objectivity on their own work.
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Upcoming Resident Events
- Instrument Gym: Kallie
  Apr. 23, 5am (PT) | 8am (ET) | 1pm (UK)
- Office Hours: Cato Zane
  Apr. 23, 2pm (PT) | 5pm (ET) | 10pm (UK)
- Office Hours: Jam Phelps
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- Office Hours: Cinnamontal
  Apr. 26, 1pm (PT) | 4pm (ET) | 9pm (UK)
- Weekly Beat Challenge: Nathan
  Apr. 27, 7am (PT) | 10am (ET) | 3pm (UK)
- Office Hours: Cato Zane
  Apr. 27, 9am (PT) | 12pm (ET) | 5pm (UK)
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Upcoming Courses
- Apr 19, 2026 Theory: Musician Basics
- Apr 22, 2026 Mixing: Effects, Synths & Tools
- Apr 27, 2026 DAW Core Skills
- Apr 27, 2026 FL Studio
- May 23, 2026 Logic Pro 1-Day Intensive
- Jun 10, 2026 Hardware & Recording Primer
- Jul 8, 2026 Hardware & Recording Primer
- Jul 12, 2026 DAW Core Skills
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Sum and Difference

Mid/Side: Sum, Difference, and the Stereo Field

Beat Kitchen At-A-Glance

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